kg is located at the midspan. The machine is working under a constant force of 500 N and accidentally stopped after 0.7 sec (rectangular pulse). Determine the following: Stiffness, ? = _____________________ Angular natural frequency, ?? = _________________ Displacement at t = 0.7 seconds ?(? = 0.7) = _______________________ Displacement at t = 1.5 seconds ?(? = 1.5) = _______________________ (???)? = _______________
kg is located at the midspan. The machine is working under a constant force of 500 N and accidentally stopped after 0.7 sec (rectangular pulse). Determine the following: Stiffness, ? = _____________________ Angular natural frequency, ?? = _________________ Displacement at t = 0.7 seconds ?(? = 0.7) = _______________________ Displacement at t = 1.5 seconds ?(? = 1.5) = _______________________ (???)? = _______________
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
A rectuangular wooden beam ( fb = 7.0 MPa, E = 12.9 GPa) ha s across-sectional area of
300 mm by 600 mm. The beam has a simple span of five meters. A vibrating machine weighing
800 kg is located at the midspan. The machine is working under a constant force of 500 N and
accidentally stopped after 0.7 sec (rectangular pulse). Determine the following:
Stiffness, ? = _____________________
Angular natural frequency, ?? = _________________
Displacement at t = 0.7 seconds ?(? = 0.7) = _______________________
Displacement at t = 1.5 seconds ?(? = 1.5) = _______________________
(???)? = _______________
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